Babies who spend time babbling with other babies may be happier - and develop language skills earlier, according to research from Canada's McGill University. In a recent study, 5-month-old infants were found to prefer noises made by other babies over sounds made by adults.When given an option, babies spent 40 percent more time listening to other babies.Even moms' imitations of baby sounds couldn’t compete with infants' preference for noises made by their peers.Scientists used a synthesizer that mimicked vowel sounds made by humans at various ages to conduct the study. They found similar results with 7-month-olds, the age when babies begin to babble.